21-4x=7

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Solution for 21-4x=7 equation: 



21-4x=7

We move all terms to the left:

21-4x-(7)=0

We add all the numbers together, and all the variables

-4x+14=0

We move all terms containing x to the left, all other terms to the right

-4x=-14

x=-14/-4

x=3+1/2

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